42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
JavaScript
// Create Null at Selected Layers — an EffectCraft sample script (original work, MIT OR
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// Apache-2.0).
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//
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// Adds a null at the centroid of the selected layers' positions (at the current time) and
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// parents the layers that have no parent to it (set PARENT below to false to skip that).
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// One undo step.
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(function createNullAtCentroid() {
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var PARENT = true;
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var comp = app.project.activeItem;
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if (!(comp instanceof CompItem)) {
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alert("Create Null: open a composition first.");
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return;
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}
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var layers = comp.selectedLayers;
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if (layers.length === 0) {
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alert("Create Null: select one or more layers.");
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return;
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}
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var t = comp.time;
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var sum = [0, 0, 0];
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for (var i = 0; i < layers.length; i++) {
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var p = layers[i].transform.position.valueAtTime(t, false);
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sum[0] += p[0];
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sum[1] += p[1];
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sum[2] += p.length > 2 ? p[2] : 0;
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}
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var c = [sum[0] / layers.length, sum[1] / layers.length, sum[2] / layers.length];
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app.beginUndoGroup("Create Null at Selected Layers");
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var nul = comp.layers.addNull();
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nul.name = "Centroid";
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nul.transform.position.setValue(c);
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if (PARENT) {
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for (var k = 0; k < layers.length; k++) {
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if (!layers[k].parent) layers[k].setParentWithJump(nul);
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}
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}
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app.endUndoGroup();
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writeLn("Null at [" + c[0].toFixed(1) + ", " + c[1].toFixed(1) + "]");
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})();
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